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Home > Plant Encyclopedia > Species

Common sunflower
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A species of Sunflowers, Also known as Sunflower, Annual sunflower
Botanical name : Helianthus annuus Genus : Sunflowers

Common sunflower, A species of Sunflowers
Also known as:
Sunflower, Annual sunflower
Botanical name: Helianthus annuus
Genus: Sunflowers
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Content

Description People often ask General Info Care Guide for Common sunflower Weeds

Common sunflower (Helianthus annuus)

Description

The common sunflower is recognizable for its bright flower on a very tall stem. It is often grown in gardens. These flowers have been important in culture: they were worshipped by the ancient Inca people, and today, they represent eco-friendly movements. The artist Vincent Van Gogh made a famous series of paintings about common sunflowers. Wild versions of the plant branch out to many flower heads, but domesticated plants typically only have one.
Plant Type
Herb
Bloom Time
Summer, autumn
Flower Color
Yellow
Orange
Red
Brown
Black
Leaf Color
Green
* Disclaimer: Content feedback CAN NOT be used as any basis for EATING ANY PLANTS. Some plants can be VERY POISONOUS, please purchase edible plants through regular channels.

People often ask

How Often to Water Common sunflower?

How Much to Water Common sunflower?

What Is the Best Way to Water the Common sunflower?

How to Know If You Are Watering Common sunflower Enough?

What to Do If Your Water Common sunflower Too Much or Too Little?

How do you take care of common sunflower?

How long do sunflowers last?

What can you not plant with sunflowers?

Where are sunflowers commonly found?

What do common sunflower symbolize?

General Info

Name story

Common sunflower
Generally, most people think that the naming of sunflower is based on the direction of sunrise and sunset. However, this is not the case. Matured sunflower will only face the East and it will not rotate with the direction of the sun. Nevertheless, the misconception of it facing the sun has embedded deeply in people's mind. Hence, it is called common sunflower.

Symbolism

Silent love, admiration, loyalty, long life, good fortune

Usages

Artistic Value
The common sunflower is often the subject of music, poetry and paintings. The most famous painting is Van Gogh's Sunflower.
Environmental Protection Value
It can purify the metal content of the soil.
Garden Use
The bright and beautiful common sunflower is a common annual in sunny home gardens. The tall stalks and large sunny blooms make it a beautiful backdrop to many other low-growing flowers in cottage and prairie/meadow gardens. Beans and squash are good veggies to grow with sunflowers, as they help balance the pH in the soil.

Care Guide for Common sunflower

Water

Common sunflower requires infrequent but deep watering in order to help its roots grow. The key growth period is three weeks before and after flowering; at this time the plant should be watered weekly until the topsoil is moist.

Fertilization

Fertilization once a month during the growing season.

Harvest Time

Summer, autumn

Propagation

Sowing

Potting Suggestions

Needs excellent drainage in pots.

Is common sunflower a potential weed plant?

While some cultivars and hybrids of common sunflower (Helianthus annuus) are grown as ornamental plants or as oil crops, the wild form is considered an agricultural weed in Europe, including Spain, France and the Balkan countries. It is also listed as a noxious weed in the US state of Iowa. The plant's weedy form is distinguished by its strong branching and multiple flower heads.
There are several reasons why common sunflower is considered an agricultural weed. It has high water needs, plus it grows tall and rapidly. It has a tendency to self-seed and grow freely on disturbed land, including the edges of corn, soy, and commercial sunflower fields, drawing water and nutrients away from the desired crops. Intensive herbicide use in maize fields can render weedy common sunflower herbicide-resistant.

Is it a Weed?

The wild common sunflower is an invasive weed. It is a common weed in the United States. Its seeds can be widely spread through humans and birds. With the fast growth rate, it will inhibit the nearby plants.

Environmental Threats

Native to the U. S. and Mexico, common sunflower is regarded as an invasive species in Kenya.

How to Control it

The best time to remove weeds is before bearing fruits.
  1. Pulling out: For a kind of herb, wear gloves or use tools to dig weeds. 
  2. Pruning: For an annual plant, pruning its aboveground parts can effectively control the growth.
  3. Plowing: Plow the soil before cultivation and bury the whole weed in the soil. 
  4. Chemical control: If in large amounts, weeds can be removed by the herbicide.

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Common sunflower (Helianthus annuus) Common sunflower (Helianthus annuus)

Scientific Classification

Phylum
Vascular plants
Class
Dicotyledons
Order
Asters bellflowers fanflowers and allies
Family
Daisy
Genus
Sunflowers
Species
Common sunflower
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